The minimum energies used in the calculations are at 1 KeV (protons and helium ions) and 10 KeV (electrons), and the maximum are 1 GeV. The standard energy grids are set at 81 for electrons, equally spaced (logrithmically), 133 for protons, and 122 for helium ions. The lower energy electron calculations (< 10 KeV) have up to 5-10% errors and are considered too fallable.

Any IBM PC or compatible using a parallel printer (Epson, IBM, or HP laserjet) would be adequate. A math co-processor is necessary. The entire software package with examples will require 2.7 Mbytes of space on the harddrive.